Bobbin-stripper trap



J. J. HENDERSON ET AL BOBBIN STRIPPER TRAP March 6, 1928. 1,661,724

Filed April (50. 1925 3 Sheets-Sheet 1 1 I INVENTOES ATTORNEY. V

March 6, 1928. 1,661,724

J. J. HENDERSON ET AL BOBBI-N STRI PPER TRAP Filed April 30. 1925 3 Sheets-Sheet 2 INVENTOR. Z i Y ATTORNEgJI J. J. HENDERSON ET AL March 6, 1928.

BOBBIN STRIPPER TRAP s Sheets-Sheet 3 Filed April 50. 1925 a 2 INVENTORJ ATTORNEYS.

Patented Mar. 6, 1928.

UNITED'STATES PATENT OFFICE-.3

JOHN J. HENDERSON, F DRACUT, AND HOWARD c. nnnnme, [or MALDEN, MAssA-x onnsnrrs; ANNA I. HENDERSON, ADMINISTRA'IRIX OF SAID JOHN J. HENDER SON, DECEASED, ASSIGNORS T0 AUTOMATIC BOBIBIN CLEANER GQ, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

BOBBIN-STRIPPER TRAP.

Application filed A rn so, 1925. Serial No. 26,960.

Our invention relates to what are known automatic or weft replenishing looms. It is particularly adapted for such looms wherein, by means of suitable feeler mechanism, when the yarn on abobbin in a shut tle has been unwound down to a certain predetermined point, bobbin changing mechanism is operated whereby a full bobbin is forced down, usually by what is known as a hammer, on to the nearly empty bobbin, taking the latters place in the shuttle, while the almost empty bobbin drops down into a can or other receptacle.

To avoid mispicks the bobbin changing mechanism operates before all the yarn has unwound from the bobbin, and the result is that ordinarily the discharged bobbins have a certain amount of yarn still on them.

Before the bobbin is rewound this waste end must be removed, either by hand or by some machine, in either case necessitating an additional process.

It is the purpose of our device to provide an improved trap on the lay beam whereby the yarn on the nearly empty bobbin which either runs back to the selvage of the cloth or has been severed, will be positively caught just as the bobbin has passed through, and held with sufiicient force so that as the bobbin descends the yarn will unwindy and preferably come in contact with winding mechanism located below and back of its path.

Instead of winding mechanism the bobbin might be dropped into a chute of sufficient length so that when it reached the bottom the yarn would have been entirely unwound.

Ordinarily in such looms, when the feeler mechanism for changing the bobbin oper This device is an improvement on the patent to James T. Malloy, on bobbin stripper V for automatic looms, 1,423,670, July 25, 1922. It is especially adapted for "what are known as Draper looms wherein thepicker stick travels in a direct line .with the shuttle and at part of itstraverse enters the bobbin passage in the lay beam. This prevents using a trap inthe bobbin passage, as it would be hit by the picker stick. Insteadof a skeleton construction of trap, we use sheet material for both members whereby the possibility of the bobbin getting through with out the yarn being caught is entirelyel'iminated. I By sheet metal, we Inca a substantially nnperforate plate of metal as distinguished from a wire or skeleton construction.

Our trapis so made, adjusted and timed in operation thatit positively, grabs the end of yarn after the bobbin has passed through but before the end has passed through and then holds the end firmly until the winding mechanism seizes it but not so firmly as to I prevent it from slipping through when pulled firmly by the winding mechanism.

By making it of sheet metal the bobbin must go between the jaws and as they open only to let it pass and instantly close a padded edge on the yarn with a force adjustalile by a spring, and do notopen again until the next bobbin shift, theslipping grip .on the yarn is certain and just strong enough. Moreover the parts do not wear out as rapidly as when the trap opens at every pick. i

In the drawings, Fig. 1 is a plan View of part of the magazine end of a Draper loom with our device in place, some parts being broken away forclearness, and. the magazine. being outlined in dotted lines.

Fig. 2 is a fview of the fixedj aw of our trap. Fig. 3 is a front elevation of one end of a loom with our trap in place.

Fig. 4 is a side elevation of a loom, with the lay beam at almost its nearest point to the breast beam, showing our trap open.

Fig. 5 is a View similar to Fig. 4, showing the lay beam away from the breast beam,

. and our trap closed.

Fig. 6 is a perspective view of the trap end of the loom.

Fig. 7 is a detail of one type of lifting triggeigon line 7--7 of Fig. 6.

Fig. 8 is a detail showing the movable jaw, opening arm and closing spring, detached from the trap proper. p v

Fig. 9 is a persp'ective view of a Draper loom with another type of arm guide for the trap opening arm.

Fig. 10 is a detail elevation enlarged as from the left of Fig. 9.

Fig. 11 is an elevation from the right of Fig. 10.

Fig. 12 is a detail view showing part 'of another type of loom, from the side, with the trap open.

Fig. 13 is a view similar to Fig. 9, showing the trap closed.

Fig. 1 1 is a perspective showing the movable jaw of the trap shown in Figs. 9 and 10.

Fig. 15 is a detail of the lifting bar.

In'the drawings K represents the frame of an automatic loom having a lay beam M and a magazine 10 of any well known type.

In the lay beam under the shuttle race at the magazine end is a bobbin passage through which the empty bobbin B is discharged and the lay beam also has the usual picker stick 21 and the picker 22.

As shown in Figs. 1 and 3 in what is known as a Draper loom this picker stick travels back and forth in direct line with the axis of the shuttle D and at its forward traverse in throwing the shuttle enters into the bobbin passage 20.

In this type of loom, there is at the end of the breast beam, opposite the magazine, suitable feeler mechanism of well known construction indicated by E which so operates that when'the yarn on the bobbin has run off to a predetermined point the sleeve which usually surrounds the change shaft 31 is partly revolved. The bobbin changing lever 32 is fixed to sleeve 30 and at its forward end tern'iinates in a groove 33 which engages a pint-J4 on the curved arm 35 pivoted to the frame at 36 and extending up and over. Arm 37, which carries cam -11 having a slot 40, is carried by arm 35, and pin 17 carried by trigger T enters slot 40.

This trigger mechanism T is pivoted to bellcrank fixed to shaft 51, which carries hammer A, and extends forward to a nose tfl in such position that when down as shown at F ig. 5, in its normal position, the nose will not engage the finger F fixed to the lay beam M. v I

lVhcn the bobbin shifting feeler operates however, lever 32 operating through arm 35, pins 37and 47, and cam 41 lifts trigger T to the position shown in Fig. 4,'and as the lay advances to the breast beam, finger F engages nose &2 and forces back trigger T together with the bell crank hammer arm 50 which is fixed to shaft 51 which is pivoted to the breast beam in suitable bearings.

This occurs when the lay moves up to the breast beam and when it moves away, linger F disengages from nose 42 and spring 38 brings back the members 35 and 'l' to At the other side or at the front of bob bin passage 20, we locate the movable jaw 31 of my trap C which is pivoted on or with rod (32 carried in bearings 63. Fixed to and extending from this rod is an opening arm 64 in such a position that ordinarily. as the lay heats up. it touches nothing, but when the trigger T is lifted, arm 64: comes in contact with a pin -15 carried by a downward extension 14 from trigger T. A returning spring 6:": tends to keep the lower edge of the movable jaw (l1 in engagmnent with the fixed jaw 60.

\Ve also show a switch finger 66 extending out from the fixed jaw (30 through a hole (ST in the movable jaw (31, in such position that one end of the falling bobbin will strike it and prevent the bobbin from escaping from the trap as it descends.

We prefer to provide a winding member (1 positioned below and behind the path of the bobbin after it passes through the trap reroluble by any suitable means as a belt 1) whereby the waste end 8 of the yarn will be caught and wound oil' of the discharged bobbin.

The mcetingline of the trap jaws should so lit and the. tension of the trapspring (35 should be such that the waste end 8 of the yarn will be pulled through the jaws by the winder G as italso nnwinds the yarn from bobbin B while it is dropping or after it is in can or chute 7.

If this end is short or it the bottom of the can or chute is far enough away, the winder G may be omitted as shown in patent to Malloy on bobbin stripper for automatic looms No. 1,423,670, July 25, 192:2.

Spring is connected at one end to a bracket 113, and at the other end, by a hook 111, to any one of the holes 11:2. on an arm 110 fixed on rod 62, and preferably adjustable thereon by a set screw 114. By means of holes 112, and set screw 114, the tension on the movable jaw 61 can be altered.

Gil

is pivoted to the lay beam 70 in It is quite essential. that there should be the right grip on the yarn, and to secure this holding grip, besides the adjustment just described, we prefer to bend the end of jaw 61 at 68, and to pad it, as with leather orother similar material 69, so that wherever the yarn is caught by the-snapping of the jaws of raising the trap opening arm 64. In these views we show an arm guide P connected to the lifting member which in this case is lever 32, by means of a shaft 101 carried in bearings 102, on a plate 103 attached to any suitable part, as 106, of the frame -K of theloom. At the other end of shaft 101 is another short connecting arm 104 adjustably pivoted to a block 105, carried by lever 32, by means of slot 106 and screw 107.

It is obvious that when lever 32 rises as shown by the dotted lines in Fig. 10, it will move arm 104 and arm guide P, the whole being so positioned that arm guide P will come up in the path of opening arm 64 and cause itto rise, thusopeningthe trap just before the old bobbin is forced out of the shuttie by the new bobbin and hammer.

We prefer to use the type of arm guide such as shown at P with its accessories 103, 101, 104 and 105 to arm guide and its hanger 44, because it connects with arm 32 which very strong.

As the lay beam recedes, the lifting member 32, arm guide P and opening arm. 64 all are pulled down by saddle 120 and spring 121 which corresponds with spring 38, and movable jaw 61 closes with a snap on fixed jaw at just the right moment to catch the trailing end of the yarn.

In Figs. 12, 13, 14 and 15, we show the ap plication of 'o'ur trapto a slightly diflen eut type of loom. As shown it may be a Croinpton & Knowles magazine loom.

represents the lay beam and L, a stationary part of the frame which carries the breast beam.

picker which is actuated by a picker stick 7-3, which does not run in line with the ains of shuttle S and therefore does not enter bobbin assa e 71 in lav 7 0 throu h which the nearly empty bobbin is propelled by the entry of a full bobbin from a battery or magazine, when shifted by suit able mechanism including hammer 81.

76 is the fixedjaw of our trap shown as of sheet metal but it may be of any material, and 77 is the movable jaw carried by shaft 78 which also carriesopening arm 79, and

any suitable manner.

The hammer 81 is pivoted at to the,

l S is ashuttle and 72 a shuttle box into which it runs, while 74 is a frame L,-aiid has another arm 82 to which at 84 is pivoted the finger 83, which when lifted engages a'nose 75 on the lay beam, and as thelay advances, it is thereby pushed baclnthus forcingback arm'82 and forcing hammer 81 down thuschan 'in the bobbin.

7 1111s occurs in this type of loom when the yarn on the old bobbin is almost exhausted, and is accomplished throughthe lifting rod R which connects with suitable machiner not shown, and extends down under ringer 83.

In place of the pin 45 we use abar 8G pivoted at 87 to frame L and connected by means of a rod 85 to finger 83, so that when finger 83 is lifted, 80 is also lifted into the pathof arm 79, pivoted to move with jaw 77, so that as thelay advances, the pivoted jaw 77, when the trapopens, allowsthe old bobbin to pass through at exactly the right time.-

The jaw 77 may be kept normally closed and will be closed immediately after the arm 79 disengages from arm, guide 86 by means of ahelical spring 165.

i We claim: 1

1. The combination with a weft replenish- 'ing loom having a frame, a. change shaft sleeve bobbin changing mechanism, a lay beam with a bobbin passage, and a. picker stick which enters said passage; of a. trap posi-,

spring adj ustably connecting-the spring arm with the lay beam frame whereby the padded lower edge of the movable jaw is normally kept iii engagement with the fixed jaw; an opening arm extending towards the breast beam, fixed to the movable jaw and pivotal therewith; a bobbinchanging lever carried by the change shaft sleeve; a short shaft revoliible in bearings carried by the loom frame; a short arm carried thereby and pivoted tothe bobbin changing lever;

an arm guide carried by the other end of the short shaft; and a yarn winding member positioned proximate the path of the d1scharged bobbin.

2, The combination with a weft replenishing loom having a frame, a change shaft sleeve, bobbin changing mechanism, a lay beam with a bobbin passage, and a picker stick which enters said passage: of a trap positioned undersaid bobbin passage (30111 prising a fixed sheet metal jaw extending downfrom a pointon one side of said passage infront of the forward position of the picker stick in said passage;'and a movable sheet metal jawhaving a padded lower edge cooperating therewith pivoted to the lay beam at the otherside of said passage; a trap spring adapted to keep the padded bottom edge of the movable jaw normally in engagement withthe fixed jaw; an opening arm extending towards the breast beam, fixed to the movable jaw and pivotal therewith; an arm guide normally out of the path of the opening arm; and means connecting with the bobbin changing mechanism and the arm guide whereby it is lifted into the path of the opening arm just before the bobbin is shifted and is released just after the bobbin has passed through the bobbin passage and through the trap; together with a yarn winding member revoluble at a position below and behind the path of the bobbin after it passes through the trap.

3. The combination with a weft replenishing loom having bobbin changing mechanism, a lay beam with a bobbin passage and a picker; of a trap positioned under said bobbin passage comprising a fixed sheet metal jaw extending down from one side of said passage; and a movable sheet metal jaw having a padded lower edge cooperating therewith pivoted to the lay beam at the other side of said passage; adjustable spring means adapted to keep the bottom edge of the movable jaw normally in engagement with the fixed jaw; an opening arm fixed to the movable ja and pivotal therewith extending towards the breast beam; an arm guide normally out of the path of the open ing arm; and means connecting with the bobbin changing mechanism and the arm guide whereby it is lifted into the path of the opening arm just before the bobbin is shifted and is released just after the bobbin has passed through the bobbin passage and through the trap.

i. The combination with a weft replenishing loom having bobbin changing mechanism. a lay beam with a bobbin passage and and a picker; of a trap positioned under said bobbin passage com 'irising a fixed sheet metal jaw extending down from one side of said passage; and a movable sheet metal jaw having a padded lower edge cooperating therewith pivoted to the lay beam at the other side of said passage; adjustable spring means adapted to keep the bottom edge of the movable jaw normally in engagement with the fixed jaw; and means to open the movable jaw when the bobbin is changed.

' 5. The combination with a weft replenishingloom having a lay beam with a bobbin passage and bobbin transferring mechanism adapted to replace a bobbin in the shuttle with a fresh bobbin froma magazine under certain conditions of yarn on the first named bobbin while the lay beam is beating up, such mechanism cooperating with a lifting member on the frame whichis raised during such conditions; of. a trap positioned under the lay beam bobbin passage comprising a.

sheet metal jaw fixed at the back and a sheet metal jaw pivoted at the front, having an opening arm which extends forward, and a flattened padded edge which engages the fixed jaw; spring means to close the jaws; and an arm guide so connected to the lifting member as to engage the opening arm when the lifting member is raised.

6. The combination with a weft replenishing loom having a lay beam with a bobbin passage in which a picker stick travels; of a sheet metal jaw fixed at the back under the bobbin passage by means of an ear at its top so as to leave room for the picker stick to move; a sheet metal jaw pivoted at its top to the fr'ontof the lay beam under the bobbin passage; an opening arm which extends forward from the pivoted jaw; a spring arm adjustably attached to the pivoted jaw; and a closing spring attached to the lay beam and adj ustably attached to the spring arm.

7. The comliiination with a weft replenishing loom having a lay beam with a bobbin passage; of a sheet metal jaw fixed at the back under the bobbin passage and extending downward therefrom; a sheet metal jaw pivoted at the from under the bobbin passage and extending downward therefrom; an opening arm which extends forward from the pivoted jaw; a spring arm adjustablj' attached to the pivoted jaw; and a closing spring attached to the lay beam and adjustably attached to the spring arm.

8. The combination with a weft replenish ing loom having bobbin cl'langing mechanism and a lay beam with a bobbin )assage; of a trap positioned under said bob bin passage comprising a fixed sheet metal jaw extending down from one side of said passage; and a movable sheet metal jaw having a padded bottom edge cooperating therewith pivoted to the lay beam at the other side of said passage; a trap spring adapted to keep the bottom edge of the movable jaw normally in engagement with the fixed jaw; an opening arm fixed to the movable jaw and pivotal therewith extending towards the breast beam; an arm guide normally out of the path of the opening arm; and means connecting with the bobbin changing mechanism and the arm guide whereby it is lifted into the path of the opening arm just before the bobbin is shifted and is released, just after the bobbin has passed through the bobbin passage and through the trap.

9. The combination with a weft replenishing loom having a lay beam with a bobbin passage and bobbin transferring mechanism adapted to replace a bobbin in the shuttle with a freshbobbin from a magazine under certain conditions of yarn on the firstnamed bobbin while the-lay beam is beating up,

opening arm which extends forward, and a padded end which engage the fixed jaw; and an arm guide so connected to the lifting member as to en age the opening arm When 10 the lifting memberis raised.

HOWARD C. DEERING. JOHN J. HENDERSON. 

